Etymology: (1325–75; ME < MF, fem. of tiers < L tertiusthird)
Definition of 'Tierce'
Princeton's WordNet
1. (noun)terce, tierce the third canonical hour; about 9 a.m.
2. (noun)three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace the cardinalnumber that is the sum of one and one and one
3. (noun)one-third, third, tierce one of threeequalparts of a divisible whole "it contains approximately a third of the minimum daily requirement"
2. (noun)Tierce a cask whose content is one third of a pipe; that is, forty-two wine gallons; also, a liquidmeasure of forty-two wine, or thirty-five imperial, gallons
3. (noun)Tierce a cask larger than a barrel, and smaller than a hogshead or a puncheon, in which salt provisions, rice, etc., are packed for shipment
Definitions of Tierce 
